int main() {
std::string seq = "abc";
std::vector<std::string> seqs = p_all(seq, seq.length());
for(std::vector<std::string>::iterator iter = seqs.begin(); iter != seqs.end(); ++iter)
std::cout<<*iter<<std::endl;
return 0;
}
int main(void) {
int ary[_SIZE_], i, mod;
srand((unsigned int)time(NULL));
for (i=0, mod=_SIZE_<<3; i<_SIZE_; i++)
ary[i] = rand()%(mod);
printf("排序前: ");
p_all(ary, _SIZE_);
quick_sort(ary, 0, _SIZE_-1);
printf("排序後: ");
p_all(ary, _SIZE_);
return 0;
}
std::vector<std::string> p_all(const std::string& seq, int n) {
std::vector<std::string> seqs;
if(n == 1) {
seqs.push_back(std::string(1, seq[0]));
return seqs;
}
std::vector<std::string> sub_seqs = p_all(seq, n-1);
for(std::vector<std::string>::iterator iter = sub_seqs.begin(); iter != sub_seqs.end(); ++iter) {
std::string sub_seq = *iter;
seqs.push_back(seq[n-1] + sub_seq);
for(int i = 1; i < n-1; ++i)
seqs.push_back(sub_seq.substr(0, i) + seq[n-1] + sub_seq.substr(i, n-1-i));
seqs.push_back(sub_seq + seq[n-1]);
}
return seqs;
}